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1. 发明专利

JP5528399B2 Electronic watermark embedding method, a digital watermark detection method and apparatus, as well as program 有权
公开(公告)号：JP5528399B2
公开(公告)日：2014-06-25
申请号：JP2011138696
申请日：2011-06-22
申请人：三菱電機株式会社 , 日本放送協会
发明人：亮介藤井 , 浩伊藤 , 浩一馬養 , 光義鈴木 , 稔和田 , 剛大竹 , 清一合志
IPC分类号： H04N7/08 , H04N19/00 , G06T1/00 , H04N1/387 , H04N19/467 , H04N19/70 , H04N19/85
CPC分类号： G06T1/0028 , G06T2201/0051 , G06T2201/0061 , H04N1/32208 , H04N1/32229 , H04N19/467 , H04N2201/3233 , H04N2201/327
摘要： An electronic image into which an electronic watermark is to be embedded is divided into a plurality of image regions spatially, and pixels each having a property of being difficult to visually recognize a variation in a pixel value are extracted as adaptive pixels from each of the plurality of image regions. A variation between the pixel values of the adaptive pixels in one of the plurality of image regions and those of the adaptive pixels in an adjacent one of the plurality of image regions is produced, and the pixel values of the adaptive pixels of the plurality of image regions are varied in a time direction according to the value of an embedded bit set of the electronic watermark. An electronic-watermark-embedded image is then generated by making the variation in the pixel values of the adaptive pixels vary step by step at a boundary between the two of the plurality of image regions and/or in the time direction so that the variation makes a slow transition.

2. 发明专利

JP4037343B2 Electronic watermark of the error rate estimation apparatus and method, and program 有权
公开(公告)号：JP4037343B2
公开(公告)日：2008-01-23
申请号：JP2003314454
申请日：2003-09-05
申请人：三菱電機株式会社 , 日本放送協会
发明人：浩伊藤 , 清一合志 , 稔和田 , 一人小川 , 亮介藤井 , 光義鈴木 , 浩一馬養 , 重典高井
IPC分类号： G06T1/00 , H04N1/387 , H04N1/40
摘要： PROBLEM TO BE SOLVED: To provide estimation device/method/program of an electronic watermark error rate for estimating probability (decoding error rate) that a decoding result of respective bits is incorrect by using a detection result of electronic watermark information from information on an object of a processing. SOLUTION: The device is provided with an electronic watermark detection circuit 2 detecting electronic watermark information by the number of embedding times at every bit from information on the object of the processing, in which electronic watermark information is repetitively embedded at every bit constituting a bit pattern by a plurality of times, a bit error rate estimating circuit 3 obtaining variation R of a detection result of electronic watermark information and estimating the bit error rate (p) of electronic watermark information from variation R and an error rate calculation circuit 5 analyzing stochastic behavior of the detection result from the detection result of electronic watermark information and the bit error rate (p) and estimating probability Pe that a result of majority decoding of the respective bits is incorrect as an analysis result. COPYRIGHT: (C)2005,JPO&NCIPI

3. 发明专利

JPWO2005079072A1 電子透かし埋め込み方法、電子透かし検出方法及び装置並びにプログラム审中-公开
公开(公告)号：JPWO2005079072A1
公开(公告)日：2008-01-10
申请号：JP2005517998
申请日：2005-02-14
申请人：三菱電機株式会社 , 日本放送協会
发明人：亮介藤井 , 亮介藤井 , 伊藤　浩 , 浩伊藤 , 浩一馬養 , 浩一馬養 , 鈴木　光義 , 光義鈴木 , 和田　稔 , 稔和田 , 大竹　剛 , 剛大竹 , 合志　清一 , 清一合志
IPC分类号： H04N7/08 , H04N7/26 , G06T1/00 , H04N1/387 , H04N19/00 , H04N19/467 , H04N19/70 , H04N19/85
CPC分类号： G06T1/0028 , G06T2201/0051 , G06T2201/0061 , H04N1/32208 , H04N1/32229 , H04N19/467 , H04N2201/3233 , H04N2201/327
摘要：電子透かし埋め込み対象の電子画像を複数の画像領域に空間的に分割し、画素値の変化が視認されにくい特性を有する画素を適応画素として上記画像領域ごとに抽出して、電子透かしの埋め込みビット値に応じて上記画像領域間及び時間方向で上記適応画素の画素値を変化させると共に、上記画像領域間の境界及び/又は時間方向で画素値変化の遷移が緩慢になるように段階的に変化させることにより電子透かし埋め込み画像を生成する。

4. 发明专利

JP4754204B2 Electronic watermark embedding apparatus 有权
公开(公告)号：JP4754204B2
公开(公告)日：2011-08-24
申请号：JP2004330788
申请日：2004-11-15
申请人：三菱電機株式会社 , 日本放送協会
发明人：晴幸中村 , 浩伊藤 , 清一合志 , 稔和田 , 剛大竹 , 恵吾真島 , 亮介藤井 , 光義鈴木
IPC分类号： H04N7/08 , H04N7/081 , H04N19/00 , H04N19/102 , H04N19/134 , H04N19/467 , H04N19/70

5. 发明专利

JP4271018B2 Electronic watermark embedding method, a digital watermark detection method and apparatus, as well as program 有权
公开(公告)号：JP4271018B2
公开(公告)日：2009-06-03
申请号：JP2003399804
申请日：2003-11-28
申请人：三菱電機株式会社 , 日本放送協会
发明人：浩伊藤 , 清一合志 , 稔和田 , 一人小川 , 亮介藤井 , 光義鈴木 , 浩一馬養 , 重典高井
IPC分类号： G06T1/00 , H04N1/387 , G09C5/00 , H04N1/40
摘要： PROBLEM TO BE SOLVED: To provide a method for inserting an electronic watermark in which the intensity of electronic watermark can be controlled by reflecting the partial properties of digital data adaptively and the electronic watermark does not deteriorate even if encoding is performed, and to provide a method and a device for detecting an electronic watermark and a program for implementing it by a computer. SOLUTION: When an electronic watermark of N bit is ciphered in an image x, sets An and Bn of N sets of pixel are extracted from the image x. Function value f(a n , b n ) of the vectors a n and b n of the instance of these sets is the operated and quantized depending on the n-th bit value of electronic watermark information. The vectors a n and b n are then altered based on the statistic of pixel value in the neighborhood of each pixel constituting the sets An and Bn such that the function value matches a quantized representative, and an image having them as elements is outputted as an image inserted with an electronic watermark. COPYRIGHT: (C)2005,JPO&NCIPI

6. 发明专利

JP4874578B2 The image encoding device 有权
公开(公告)号：JP4874578B2
公开(公告)日：2012-02-15
申请号：JP2005172654
申请日：2005-06-13
申请人：三菱電機株式会社
发明人：浩伊藤 , 稔和田 , 和夫杉本 , 光太郎浅井
IPC分类号： H04N13/00 , H04N19/423 , H04N19/50 , H04N19/503 , H04N19/51 , H04N19/593 , H04N19/597 , H04N19/61 , H04N19/625 , H04N19/63 , H04N19/91

7. 发明专利

JP4323519B2 Decryption program and the method and apparatus of the encoded data 有权
公开(公告)号：JP4323519B2
公开(公告)日：2009-09-02
申请号：JP2006510590
申请日：2004-03-08
申请人：三菱電機株式会社
发明人：浩伊藤 , 稔和田 , 智広木村 , 亮介藤井 , 光義鈴木 , 浩一馬養
IPC分类号： H03M7/30 , G10L19/00 , H04N1/41 , H04N19/00 , H04N19/12 , H04N19/136 , H04N19/192 , H04N19/40 , H04N19/44 , H04N19/467 , H04N19/625 , H04N19/63
CPC分类号： H04N19/44 , G10L19/00 , H04N19/126 , H04N19/18 , H04N19/60

8. 发明专利

JP4964221B2 Falsification detection device and falsification detection method 有权
公开(公告)号：JP4964221B2
公开(公告)日：2012-06-27
申请号：JP2008332926
申请日：2008-12-26
申请人：三菱電機株式会社
发明人：嘉明加藤 , 稔和田 , 豊和菅井
IPC分类号： H04N1/387 , G06T1/00 , G09C5/00
摘要： PROBLEM TO BE SOLVED: To provide a tampering detection apparatus and tampering detection method which perform high accuracy tampering detection even under relatively large deterioration of an image to be detected with respect to a source image. SOLUTION: A signal image for comparison corresponding to bits of watermark information extracted from image data D1 to be detected is generated, the watermark information being constituted of a bit stream in which values of bits are specified in accordance with a correlation between the signal image for comparison and a source image I, and the image data D1 to be detected being obtained by embedding the watermark information while superimposing it on the source image I. A correlation value between the image data D1 and each signal image for comparison is calculated, the bits of the watermark information is compared with the correlation value of the corresponding signal image for comparison. When the values of the bits of the signal image for comparison are not matched with the correlation between the signal image for comparison and the source image I, from these comparison results, absolute values of the correlation values are integrated, and on the basis of the integrated value, presence/absence of tampering for the image data D1 is determined. COPYRIGHT: (C)2010,JPO&INPIT

9. 发明专利

JP4309428B2 Information processing apparatus and information processing method 有权
公开(公告)号：JP4309428B2
公开(公告)日：2009-08-05
申请号：JP2006527678
申请日：2004-07-15
申请人：三菱電機株式会社
发明人：浩伊藤 , 稔和田 , 智広木村 , 亮介藤井 , 光義鈴木 , 浩一馬養
IPC分类号： H04N1/387 , G06T1/00
CPC分类号： H04N1/32144 , G06T1/0092 , G06T2201/0051 , H04N1/32229 , H04N1/32347 , H04N2201/3254 , H04N2201/3266 , H04N2201/3273 , H04N2201/328

10. 发明专利

JPWO2005086357A1 符号化データの復号プログラム及び方法並びに装置有权
公开(公告)号：JPWO2005086357A1
公开(公告)日：2008-01-24
申请号：JP2006510590
申请日：2004-03-08
申请人：三菱電機株式会社
发明人：伊藤　浩 , 浩伊藤 , 鈴木　光義 , 光義鈴木 , 和田　稔 , 稔和田 , 亮介藤井 , 亮介藤井 , 浩一馬養 , 浩一馬養 , 木村　智広 , 智広木村
IPC分类号： H03M7/30 , G10L19/00 , H04N1/41 , H04N7/26 , H04N19/00 , H04N19/12 , H04N19/136 , H04N19/192 , H04N19/40 , H04N19/44 , H04N19/467 , H04N19/625 , H04N19/63
CPC分类号： H04N19/44 , G10L19/00 , H04N19/126 , H04N19/18 , H04N19/60
摘要：コンピュータに、非可逆圧縮して符号化された信号を入力し、その復号信号が存在する第1のベクトル空間において任意の実数ベクトルを一つの凸集合Xに直交射影する手段と、凸射影が収束したかどうかを判定し、凸射影が収束したと判定された場合に、集合Xに属する実数ベクトルxを求めて復号信号として出力する手段と、凸射影が収束していないと判定された場合に、第1のベクトル空間の任意のベクトルを第1のベクトル空間とは異なる第2のベクトル空間において一つの凸集合Yに直交射影した後、符号化された信号を初期値として、集合Xと集合Yへの直交射影を繰り返させる手段として機能させることで、復号されたデータをもう一度符号化した場合に元のストリームが完全に復元できる符号化データの復号プログラム及び方法並びに装置を提供する。

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